在AngularJS控制器之间共享数据

我正在尝试跨控制器共享数据。用例是一种多步骤形式，在一个输入中输入的数据稍后将用于原始控制器之外的多个显示位置。下面和jsfiddle中的代码。

HTML

<div ng-controller="FirstCtrl">
    <input type="text" ng-model="FirstName"><!-- Input entered here -->
    <br>Input is : <strong>{{FirstName}}</strong><!-- Successfully updates here -->
</div>

<hr>

<div ng-controller="SecondCtrl">
    Input should also be here: {{FirstName}}<!-- How do I automatically updated it here? -->
</div>

// declare the app with no dependencies
var myApp = angular.module('myApp', []);

// make a factory to share data between controllers
myApp.factory('Data', function(){
    // I know this doesn't work, but what will?
    var FirstName = '';
    return FirstName;
});

// Step 1 Controller
myApp.controller('FirstCtrl', function( $scope, Data ){

});

// Step 2 Controller
myApp.controller('SecondCtrl', function( $scope, Data ){
    $scope.FirstName = Data.FirstName;
});

任何帮助都非常感激。

当前回答

最简单的解决方案:

我使用了AngularJS服务。

我已经创建了一个名为SharedDataService的AngularJS服务。

myApp.service('SharedDataService', function () {
     var Person = {
        name: ''

    };
    return Person;
});

步骤2:创建两个控制器并使用上面创建的服务。

//First Controller
myApp.controller("FirstCtrl", ['$scope', 'SharedDataService',
   function ($scope, SharedDataService) {
   $scope.Person = SharedDataService;
   }]);

//Second Controller
myApp.controller("SecondCtrl", ['$scope', 'SharedDataService',
   function ($scope, SharedDataService) {
   $scope.Person = SharedDataService;
   }]);

步骤3:在视图中使用已创建的控制器。

<body ng-app="myApp">

<div ng-controller="FirstCtrl">
<input type="text" ng-model="Person.name">
<br>Input is : <strong>{{Person.name}}</strong>
</div>

<hr>

<div ng-controller="SecondCtrl">
Input should also be here: {{Person.name}}
</div>

</body>

要查看此问题的工作解决方案，请按下面的链接

https://codepen.io/wins/pen/bmoYLr

. html文件:

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>

<body ng-app="myApp">

  <div ng-controller="FirstCtrl">
    <input type="text" ng-model="Person.name">
    <br>Input is : <strong>{{Person.name}}</strong>
   </div>

<hr>

  <div ng-controller="SecondCtrl">
    Input should also be here: {{Person.name}}
  </div>

//Script starts from here

<script>

var myApp = angular.module("myApp",[]);
//create SharedDataService
myApp.service('SharedDataService', function () {
     var Person = {
        name: ''

    };
    return Person;
});

//First Controller
myApp.controller("FirstCtrl", ['$scope', 'SharedDataService',
    function ($scope, SharedDataService) {
    $scope.Person = SharedDataService;
    }]);

//Second Controller
myApp.controller("SecondCtrl", ['$scope', 'SharedDataService',
    function ($scope, SharedDataService) {
    $scope.Person = SharedDataService;
}]);

</script>


</body>
</html>

2018-10-11 04:19:32

其他回答

不知道我在哪里得到了这个模式，但对于跨控制器共享数据和减少$rootScope和$scope，这工作得很好。这让人想起有发布者和订阅者的数据复制。希望能有所帮助。

服务:

(function(app) {
    "use strict";
    app.factory("sharedDataEventHub", sharedDataEventHub);

    sharedDataEventHub.$inject = ["$rootScope"];

    function sharedDataEventHub($rootScope) {
        var DATA_CHANGE = "DATA_CHANGE_EVENT";
        var service = {
            changeData: changeData,
            onChangeData: onChangeData
        };
        return service;

        function changeData(obj) {
            $rootScope.$broadcast(DATA_CHANGE, obj);
        }

        function onChangeData($scope, handler) {
            $scope.$on(DATA_CHANGE, function(event, obj) {
                handler(obj);
            });
        }
    }
}(app));

得到新数据的控制器，也就是发布者，会做这样的事情。

var someData = yourDataService.getSomeData();

sharedDataEventHub.changeData(someData);

同样使用这些新数据的控制器，也就是所谓的订阅服务器，会做这样的事情…

sharedDataEventHub.onChangeData($scope, function(data) {
    vm.localData.Property1 = data.Property1;
    vm.localData.Property2 = data.Property2;
});

这适用于任何场景。当主控制器被初始化，它得到数据时，它会调用changeData方法，它会把那个广播给那个数据的所有订阅者。这减少了控制器之间的耦合。

2015-09-02 20:20:14

我已经创建了一个工厂来控制路由路径模式之间的共享作用域，因此您可以在用户在相同的路由父路径中导航时维护共享数据。

.controller('CadastroController', ['$scope', 'RouteSharedScope',
    function($scope, routeSharedScope) {
      var customerScope = routeSharedScope.scopeFor('/Customer');
      //var indexScope = routeSharedScope.scopeFor('/');
    }
 ])

因此，如果用户转到另一个路由路径，例如'/Support'，路径'/Customer'的共享数据将被自动销毁。但是，如果用户去到“子”路径，比如“/Customer/1”或“/Customer/list”，作用域不会被销毁。

您可以在这里看到一个示例:http://plnkr.co/edit/OL8of9

2014-09-19 02:00:37

我不喜欢使用$watch。您可以只分配数据，而不是将整个服务分配给控制器的作用域。

JS:

var myApp = angular.module('myApp', []);

myApp.factory('MyService', function(){
  return {
    data: {
      firstName: '',
      lastName: ''
    }
    // Other methods or objects can go here
  };
});

myApp.controller('FirstCtrl', function($scope, MyService){
  $scope.data = MyService.data;
});

myApp.controller('SecondCtrl', function($scope, MyService){
   $scope.data = MyService.data;
});

HTML:

<div ng-controller="FirstCtrl">
  <input type="text" ng-model="data.firstName">
  <br>Input is : <strong>{{data.firstName}}</strong>
</div>
<hr>
<div ng-controller="SecondCtrl">
  Input should also be here: {{data.firstName}}
</div>

或者，您可以使用直接方法更新服务数据。

JS:

// A new factory with an update method
myApp.factory('MyService', function(){
  return {
    data: {
      firstName: '',
      lastName: ''
    },
    update: function(first, last) {
      // Improve this method as needed
      this.data.firstName = first;
      this.data.lastName = last;
    }
  };
});

// Your controller can use the service's update method
myApp.controller('SecondCtrl', function($scope, MyService){
   $scope.data = MyService.data;

   $scope.updateData = function(first, last) {
     MyService.update(first, last);
   }
});

2014-08-05 18:11:12

还有另一种不用$watch的方法，使用angular.copy:

var myApp = angular.module('myApp', []);

myApp.factory('Data', function(){

    var service = {
        FirstName: '',
        setFirstName: function(name) {
            // this is the trick to sync the data
            // so no need for a $watch function
            // call this from anywhere when you need to update FirstName
            angular.copy(name, service.FirstName); 
        }
    };
    return service;
});


// Step 1 Controller
myApp.controller('FirstCtrl', function( $scope, Data ){

});

// Step 2 Controller
myApp.controller('SecondCtrl', function( $scope, Data ){
    $scope.FirstName = Data.FirstName;
});

2015-11-03 17:20:16